Collects both the WAR WITHIN and WAR WITHIN: DARK AGES series. In this 12-part story, four million years before the Transformers arrived on Earth, civil war rocks their home world of Cybertron, and Optimus Prime faces his first–and greatest–challenge. But before he can deal with the Decepticons, the new Autobot leader must look within, and decide if Cybertron is worth saving at all!